you use in your car. rather than the current ground based radar tracking system. the more efficiently and safely control traffic in the air, through out the united states. next gen is already being used on a trial base ills here is hey area. and the faa chairman sold off the technology. >> there are things we are doing that are improving the use of the airspace. that will result in -- a lot of benefit. right away. >> what we are going to be able to do is make remarkable changes in the airspace here that will benefit the nation. >> of while the benefits of the technological changes may come in time, several different sources worry about security flaws now. >> nick foster says the same technology that allows anyone with a receiver or a smart phone to track planes in the air, also can make this next gen cyst,000 tell vulnerable. >> i am not the only one out there that has access to the information. far from the only one that has the skills. so in that sense that is very concerning. because i would look to kb